Process of making socket members for hot-water bottles or the like.



N0. 876,361. PATENTED TA-N 14. 1908. H. P. KRAFT 6: M. C. SOHWEINERT.PROCESS OF MAKING SOCKET MEMBERS FOR HOT WATER BOTTLES OR THE LIKE.

APPLICATION FILED APR-12.1907.

FIG.

W I I H wvm WITNESSES:

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UNITED sTATEs PATENT orisron HENRY P. KRAFT, OF NEW YORK, N. Y., ANDMAXIMILIAN CHARLES SGlUVElNERT, OF WEST HOBOKEN, NEW JERSEY.

PROCESS OF MAKING SOCKET MEMBERS FOR HOT-WATER BOTTLES OR THE LIKE.

Specification of Letters Patent.

Patented Jan. 14, 1908.

Application filed April 12.1907 Serial lie. 367.852.

To all whom "it may concern:

Be it known that-wepHENaY P.: KRAFT, residing in the-borough ofBrooklyn, county of Kingsycity and-State of='Ne\v- York, and MAXIMILI'ANCHARLES SGHWEINERT, residing in West Hoboken, in the county of Hudsonand State of New Jersey, both citizens of-the United States, havejointly invented certain new and. useful= Improvementsin Processes ofMaking Socket Members for Hot-\Vater Bottles or the Like, of whiclrthefollowing is a specification.- I

This invention relates to an improved process forthe construction ofsocket members which are attached to the: necks of hot water bottles forthe reception of the stopper and other devices of a similar character.Such socket members are now usually formed of thin sheet metal having ascrew-thread rolled into the-cylindrical wall-thereof, the rollingoperation forming both an exterior thread and an interior thread, thelatter being adapted to engage the stopper. The socket member isattached to the neck of the water bottle or other device by vulcanizingthe rubber'composition forming the latter around the exterior threaded'portion of the socket member. During the operation of screwlng in thestopper and unscrewmg it,

there is considerable strain. placed upon the connection between thesocket member and the neck of the bag. This strain 18 occasionallysufhcient to loosen the connection between the parts, thus causing thebag to leak.

It has been roposed to provide the exterior thread of t -e socketmemberwith a series of indentations or projections, so as to secure a firmerconnection between the socket member and the neck of the bag, suchPIOJGCUOIIS being formed by cutting notches in the threads of the socketmember.

Our invention provides an improved proc cording to its preferred form,we first takc'a suitably shaped metal blank and by the use of propertools shape it int the form shown in Fig, 1:

is provided with a top flange a, plain cylindrical walls I) and a bottomflange 0. Heretofore the blank has been screwthreaded, and afterwardssubjected to the operation of a die to produce the roughened efi'ect,but we have found in practice that this tends to distort the metal andproduce a considerable pcrcentage of imperfcctarticles. According to ourinvention we first roughen the entire cylindrical wall 6 before theformation of the screw-threads. This is done by the use of any suitablehurling or roughcning tool (preferablythe former) which acts upon theexterior of the socket member, the knurled depressions being preferablyextended lengthwise of the socket member so that they are disposed atright angles to the strain during In this figure the socket member-\vl11(:l1 is indicated as a whole by the letter A screwing andunscrewing of the stopper.

Another important advantage in performing the nurling or rougheningoperation before the screw-threading operation is that the device may beeasily and quickly placed automatically upon a n) andrcl or expandingchuck,

-while if the nurling or other roughening operation were performedsubsequently to the screw-threading operation, the blank wouldnecessarily have to be placed upon a threaded mandrel in order that itsscrew-threads might be properly supported. This requires that each blankbe-screwcd onto the mandrel and unscrewed therefrom thus wasting considerable time at each operation. After the nurling operation the blanksare fed into a suitable screw-threadingmachine which is adapted to rolla thread in the wall of the blank, thus completing the device.

We have found in practice that in the complcted socket member theeil'ect of the nurling tool does not extend materially to the interiorwall of the member. Said wall is substantially as smooth as in anunknurled device. We have also found that the threading operation doesnot have any material effect upon the intrling on the exterior portionsof the threads, leaving these substantially asrough as before thethreading operation. The completed socket member is shown in elevationin Fig. 3 and in section in Fig. 4,

and the screw-threads by the letter e.

.thenurling being indicated by the letter (i ber and the rubber formingthe neck of the bag, with little or no increase in cost over the presentconstructions.

It will be understood while we have described our invention inconnection with a socket member for hot water ba -s, that it isapplicable to any similar device w ich itis desirable to provide with aroughened exterior. It will also be( understood while we have shown aconstruction in which all of the threads are knurled, that only part ofsuch threads may be so roughened if desired. It will also be understoodthat instead of nurling the threads any other means of roughening theexterior surface of the device may be employed.

What we claim is v 1. The process of making a screw-threaded socketmember or. the like, which. consists in forming the member intoappropriate shape, then roughening its walls, and finally screwthreadingthe roughened wall.

3. The process of making a screw-threadedsocket member or the like,which consists in forming the member into appropriate shape, then nurlintreading the murled wall.

4. The process of making a screw-threaded socket member or the like,which consists in forming the member into ap ropriateshape, then nurlingits wall, an finally screw threading the knurled Wall by bending themetal of such wall.- I

its wall, and finally screw:

In witness whereof, we have hereunto signed our names in thepresence oftwo subscribing witnesses.

HENRY P. KRAFT. MAXIMILIAN CHARLES SCHWEINERT- Witnesses:

EUGENE V. MYERS, FRED WHITEJ?

